Multi-Hackers / MPL3115A2

Class module for MPL3115A2 I2C Barometric Sensor

Dependents:   mDotEVBM2X MTDOT-EVBDemo-DRH MTDOT-BOX-EVB-Factory-Firmware-LIB-108 MTDOT-UDKDemo_Senet ... more

MPL3115A2.cpp@2:cc50526dae10, 2015-12-21 (annotated)

Committer:
Mike Fiore
Date:
Mon Dec 21 10:49:40 2015 -0600
Revision:
2:cc50526dae10
Parent:
1:072fd24cc12b
Child:
3:c41ffe71300f
protect serial transactions by disabling interrupts

Who changed what in which revision?

UserRevisionLine numberNew contents of line
falingtrea 0:3f52908a334d 1 /**
falingtrea 0:3f52908a334d 2 * @file MPL3115A2.cpp
falingtrea 0:3f52908a334d 3 * @brief Device driver - MPL3115A2 barometric pressure IC w/RTOS support
falingtrea 0:3f52908a334d 4 * @author Tim Barr
falingtrea 0:3f52908a334d 5 * @version 1.0
falingtrea 0:3f52908a334d 6 * @see http://cache.freescale.com/files/sensors/doc/data_sheet/MPL3115A2.pdf
falingtrea 0:3f52908a334d 7 *
falingtrea 0:3f52908a334d 8 * Copyright (c) 2015
falingtrea 0:3f52908a334d 9 *
falingtrea 0:3f52908a334d 10 * Licensed under the Apache License, Version 2.0 (the "License");
falingtrea 0:3f52908a334d 11 * you may not use this file except in compliance with the License.
falingtrea 0:3f52908a334d 12 * You may obtain a copy of the License at
falingtrea 0:3f52908a334d 13 *
falingtrea 0:3f52908a334d 14 * http://www.apache.org/licenses/LICENSE-2.0
falingtrea 0:3f52908a334d 15 *
falingtrea 0:3f52908a334d 16 * Unless required by applicable law or agreed to in writing, software
falingtrea 0:3f52908a334d 17 * distributed under the License is distributed on an "AS IS" BASIS,
falingtrea 0:3f52908a334d 18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
falingtrea 0:3f52908a334d 19 * See the License for the specific language governing permissions and
falingtrea 0:3f52908a334d 20 * limitations under the License.
falingtrea 0:3f52908a334d 21 */
mfiore 1:072fd24cc12b 22
falingtrea 0:3f52908a334d 23 #include "MPL3115A2.h"
falingtrea 0:3f52908a334d 24 #include "mbed_debug.h"
falingtrea 0:3f52908a334d 25 #include "rtos.h"
mfiore 1:072fd24cc12b 26
falingtrea 0:3f52908a334d 27 MPL3115A2::MPL3115A2( I2C &i2c, InterruptIn* int1, InterruptIn* int2)
falingtrea 0:3f52908a334d 28 {
falingtrea 0:3f52908a334d 29 _i2c = &i2c;
falingtrea 0:3f52908a334d 30 _int1 = int1;
falingtrea 0:3f52908a334d 31 _int2 = int2;
mfiore 1:072fd24cc12b 32
mfiore 1:072fd24cc12b 33 MPL3115A2::init();
falingtrea 0:3f52908a334d 34
falingtrea 0:3f52908a334d 35 return;
falingtrea 0:3f52908a334d 36 }
falingtrea 0:3f52908a334d 37
falingtrea 0:3f52908a334d 38 bool MPL3115A2::testWhoAmI(void)
falingtrea 0:3f52908a334d 39 {
mfiore 1:072fd24cc12b 40 char reg_val[1];
falingtrea 0:3f52908a334d 41
mfiore 1:072fd24cc12b 42 reg_val[0] = 0x00;
mfiore 1:072fd24cc12b 43 MPL3115A2::readRegister(WHO_AM_I,reg_val);
falingtrea 0:3f52908a334d 44
mfiore 1:072fd24cc12b 45 return (reg_val[0] == I_AM_MPL3115A2);
falingtrea 0:3f52908a334d 46
falingtrea 0:3f52908a334d 47 }
falingtrea 0:3f52908a334d 48
falingtrea 0:3f52908a334d 49 uint8_t MPL3115A2::init(void)
falingtrea 0:3f52908a334d 50 {
falingtrea 0:3f52908a334d 51 uint8_t result = 0;
falingtrea 0:3f52908a334d 52 uint8_t i = 0;
falingtrea 0:3f52908a334d 53 char reg_val[1];
mfiore 1:072fd24cc12b 54
Mike Fiore 2:cc50526dae10 55 __disable_irq();
falingtrea 0:3f52908a334d 56 _i2c->frequency(400000);
Mike Fiore 2:cc50526dae10 57 __enable_irq();
mfiore 1:072fd24cc12b 58
falingtrea 0:3f52908a334d 59 // Reset all registers to POR values
falingtrea 0:3f52908a334d 60 reg_val[0] = 0x04;
falingtrea 0:3f52908a334d 61 result = MPL3115A2::writeRegister(CTRL_REG1, reg_val);
mfiore 1:072fd24cc12b 62 if (result == 0) {
mfiore 1:072fd24cc12b 63 do {
mfiore 1:072fd24cc12b 64 // wait for the reset bit to clear. readRegister may error out so we re-try 10 times
mfiore 1:072fd24cc12b 65 osDelay(200);
mfiore 1:072fd24cc12b 66 reg_val[0] = 0x40;
mfiore 1:072fd24cc12b 67 result = MPL3115A2::readRegister(CTRL_REG1,reg_val);
mfiore 1:072fd24cc12b 68 reg_val[0] = reg_val[0] & 0x04;
mfiore 1:072fd24cc12b 69 i++;
mfiore 1:072fd24cc12b 70 } while(((reg_val[0] != 0) || (result != 0)) && (i<=10));
falingtrea 0:3f52908a334d 71 }
falingtrea 0:3f52908a334d 72
mfiore 1:072fd24cc12b 73 if ((result == 0) && (MPL3115A2::testWhoAmI() == true)) {
falingtrea 0:3f52908a334d 74
mfiore 1:072fd24cc12b 75 if ((_int1 == NULL) && (_int2 == NULL)) {
mfiore 1:072fd24cc12b 76 _polling_mode = true;
mfiore 1:072fd24cc12b 77 reg_val[0] = 0x07;
mfiore 1:072fd24cc12b 78 result |= MPL3115A2::writeRegister(PT_DATA_CFG,reg_val);
mfiore 1:072fd24cc12b 79 } else _polling_mode = false;
mfiore 1:072fd24cc12b 80 } else {
mfiore 1:072fd24cc12b 81 debug ("Device not supported by this library!\n\r");
mfiore 1:072fd24cc12b 82 result = 1;
falingtrea 0:3f52908a334d 83 }
falingtrea 0:3f52908a334d 84
mfiore 1:072fd24cc12b 85 if(result != 0) {
falingtrea 0:3f52908a334d 86 debug("MPL3115A2:init failed\n\r");
falingtrea 0:3f52908a334d 87 }
mfiore 1:072fd24cc12b 88
falingtrea 0:3f52908a334d 89 return result;
falingtrea 0:3f52908a334d 90 }
falingtrea 0:3f52908a334d 91
falingtrea 0:3f52908a334d 92 uint8_t MPL3115A2::setParameters(OUTPUT_MODE out_mode, DATA_MODE data_mode, OVERSAMPLE_RATIO os_ratio,
mfiore 1:072fd24cc12b 93 ACQUISITION_TIMER measure_time)
falingtrea 0:3f52908a334d 94 {
falingtrea 0:3f52908a334d 95 uint8_t result = 0;
falingtrea 0:3f52908a334d 96 char datain[4];
falingtrea 0:3f52908a334d 97 char dataout[4];
falingtrea 0:3f52908a334d 98
falingtrea 0:3f52908a334d 99 result |= MPL3115A2::readRegister(SYSMOD, datain); // Make sure MPL3115A2 is in Stand-By mode
mfiore 1:072fd24cc12b 100 if ((datain[0] & 0x01) != 0 ) {
mfiore 1:072fd24cc12b 101 debug ("MPL3115A2 not in STAND BY mode\n\f");
falingtrea 0:3f52908a334d 102 debug("MPL3115A2:setParameters failed\n\r");
falingtrea 0:3f52908a334d 103 result = 1;
falingtrea 0:3f52908a334d 104 return result;
falingtrea 0:3f52908a334d 105 }
falingtrea 0:3f52908a334d 106
falingtrea 0:3f52908a334d 107 result |= MPL3115A2::readRegister(CTRL_REG1, datain, 2);
falingtrea 0:3f52908a334d 108 dataout[0] = (datain[0] & 0x07) | os_ratio | out_mode | data_mode;
falingtrea 0:3f52908a334d 109 dataout[1] = (datain[1] & 0xF0) | measure_time;
falingtrea 0:3f52908a334d 110 result |= MPL3115A2::writeRegister(CTRL_REG1, dataout, 2);
falingtrea 0:3f52908a334d 111
mfiore 1:072fd24cc12b 112 if(result != 0) {
falingtrea 0:3f52908a334d 113 debug("MPL3115A2:setParameters failed\n\r");
falingtrea 0:3f52908a334d 114 }
mfiore 1:072fd24cc12b 115
mfiore 1:072fd24cc12b 116 return result;
falingtrea 0:3f52908a334d 117 }
falingtrea 0:3f52908a334d 118
falingtrea 0:3f52908a334d 119 uint8_t MPL3115A2::enableFIFO(void)
falingtrea 0:3f52908a334d 120 {
falingtrea 0:3f52908a334d 121 uint8_t result = 0;
falingtrea 0:3f52908a334d 122 return result;
mfiore 1:072fd24cc12b 123 }
falingtrea 0:3f52908a334d 124
falingtrea 0:3f52908a334d 125 uint8_t MPL3115A2::activeMode(void)
falingtrea 0:3f52908a334d 126 {
falingtrea 0:3f52908a334d 127 uint8_t result = 0;
falingtrea 0:3f52908a334d 128 char datain[1];
falingtrea 0:3f52908a334d 129 char dataout[1];
falingtrea 0:3f52908a334d 130
falingtrea 0:3f52908a334d 131 result |= MPL3115A2::readRegister(CTRL_REG1, datain , 2);
falingtrea 0:3f52908a334d 132 dataout[0] = (datain[0] & 0xFE) | 0x01 ;
falingtrea 0:3f52908a334d 133 result |= MPL3115A2::writeRegister(CTRL_REG1, dataout); // Set to active mode
falingtrea 0:3f52908a334d 134
falingtrea 0:3f52908a334d 135 return result;
mfiore 1:072fd24cc12b 136 }
falingtrea 0:3f52908a334d 137 uint8_t MPL3115A2::standbyMode(void)
falingtrea 0:3f52908a334d 138 {
falingtrea 0:3f52908a334d 139 uint8_t result = 0;
falingtrea 0:3f52908a334d 140 char datain[1];
falingtrea 0:3f52908a334d 141 char dataout[1];
falingtrea 0:3f52908a334d 142
falingtrea 0:3f52908a334d 143 result |= MPL3115A2::readRegister(CTRL_REG1, datain);
falingtrea 0:3f52908a334d 144 dataout[0] = (datain[0] & 0xFE);
falingtrea 0:3f52908a334d 145 result |= MPL3115A2::writeRegister(CTRL_REG1, dataout); // Set to standby mode
falingtrea 0:3f52908a334d 146
falingtrea 0:3f52908a334d 147 return result;
mfiore 1:072fd24cc12b 148 }
falingtrea 0:3f52908a334d 149
falingtrea 0:3f52908a334d 150 uint8_t MPL3115A2::triggerOneShot(void)
falingtrea 0:3f52908a334d 151 {
falingtrea 0:3f52908a334d 152 uint8_t result = 0;
falingtrea 0:3f52908a334d 153 char datain[1];
falingtrea 0:3f52908a334d 154 char dataout[1];
falingtrea 0:3f52908a334d 155
falingtrea 0:3f52908a334d 156 result |= MPL3115A2::readRegister(CTRL_REG1, datain);
falingtrea 0:3f52908a334d 157 dataout[0] = ((datain[0] & 0xFD) | 0x02);
falingtrea 0:3f52908a334d 158 result |= MPL3115A2::writeRegister(CTRL_REG1, dataout); // Trigger a measurement
falingtrea 0:3f52908a334d 159
falingtrea 0:3f52908a334d 160 return result;
mfiore 1:072fd24cc12b 161 }
mfiore 1:072fd24cc12b 162
falingtrea 0:3f52908a334d 163 uint8_t MPL3115A2::setAltitudeCalib(int16_t alti_calib)
falingtrea 0:3f52908a334d 164 {
falingtrea 0:3f52908a334d 165 uint8_t result = 0;
falingtrea 0:3f52908a334d 166 char dataout[1];
falingtrea 0:3f52908a334d 167
falingtrea 0:3f52908a334d 168 dataout[0] = alti_calib ;
falingtrea 0:3f52908a334d 169 result |= MPL3115A2::writeRegister(CTRL_REG1, dataout); // set msb of calibration value
falingtrea 0:3f52908a334d 170
falingtrea 0:3f52908a334d 171 return result;
mfiore 1:072fd24cc12b 172 }
falingtrea 0:3f52908a334d 173
falingtrea 0:3f52908a334d 174 uint8_t MPL3115A2::clearMinMaxRegs(void)
falingtrea 0:3f52908a334d 175 {
falingtrea 0:3f52908a334d 176 uint8_t result = 0;
falingtrea 0:3f52908a334d 177 char datain[10];
falingtrea 0:3f52908a334d 178
falingtrea 0:3f52908a334d 179 memset(datain, 0, 10);
falingtrea 0:3f52908a334d 180 result = MPL3115A2::writeRegister(P_MIN_MSB, datain, 10);
falingtrea 0:3f52908a334d 181
falingtrea 0:3f52908a334d 182 return result;
mfiore 1:072fd24cc12b 183 }
falingtrea 0:3f52908a334d 184
falingtrea 0:3f52908a334d 185 uint8_t MPL3115A2::getStatus(void)
falingtrea 0:3f52908a334d 186 {
falingtrea 0:3f52908a334d 187 char datain[1];
falingtrea 0:3f52908a334d 188 uint8_t dataout;
falingtrea 0:3f52908a334d 189
falingtrea 0:3f52908a334d 190 MPL3115A2::readRegister(DR_STATUS, datain);
mfiore 1:072fd24cc12b 191 dataout = datain[0];
falingtrea 0:3f52908a334d 192
falingtrea 0:3f52908a334d 193 return dataout;
mfiore 1:072fd24cc12b 194 }
falingtrea 0:3f52908a334d 195
falingtrea 0:3f52908a334d 196 int32_t MPL3115A2::getBaroData(void)
falingtrea 0:3f52908a334d 197 {
mfiore 1:072fd24cc12b 198 if (_polling_mode) {
mfiore 1:072fd24cc12b 199 char datain[3];
falingtrea 0:3f52908a334d 200 MPL3115A2::readRegister(OUT_P_MSB, datain, 3);
mfiore 1:072fd24cc12b 201 /* data is 20 bit signed/unsigned with 4 LSB = 0 Need to shift to 32 bits to preserve sign bit
mfiore 1:072fd24cc12b 202 * Altitude is 16 bit signed and pressure is 18 bit unsigned
mfiore 1:072fd24cc12b 203 */
falingtrea 0:3f52908a334d 204 _data._baro = ((datain[0] << 24) | (datain[1] << 16) | (datain[2]<<8));
falingtrea 0:3f52908a334d 205 }
mfiore 1:072fd24cc12b 206 return _data._baro;
falingtrea 0:3f52908a334d 207 }
mfiore 1:072fd24cc12b 208
falingtrea 0:3f52908a334d 209 int16_t MPL3115A2::getTempData(void)
falingtrea 0:3f52908a334d 210 {
mfiore 1:072fd24cc12b 211 if (_polling_mode) {
falingtrea 0:3f52908a334d 212 char datain[2];
falingtrea 0:3f52908a334d 213 MPL3115A2::readRegister(OUT_T_MSB, datain, 2);
mfiore 1:072fd24cc12b 214 /* data is 12 bit signed with 4 LSB = 0 Need to shift first to 16 bits to preserve sign bit then
mfiore 1:072fd24cc12b 215 * divide by 16 to remove LSBs
mfiore 1:072fd24cc12b 216 */
falingtrea 0:3f52908a334d 217 _data._temp = ((datain[0] << 8) | datain[1]);
falingtrea 0:3f52908a334d 218 _data._temp /= 16;
falingtrea 0:3f52908a334d 219 }
mfiore 1:072fd24cc12b 220 return _data._temp;
falingtrea 0:3f52908a334d 221 }
falingtrea 0:3f52908a334d 222
falingtrea 0:3f52908a334d 223 int32_t MPL3115A2::getMinBaro(bool clear_data)
falingtrea 0:3f52908a334d 224 {
mfiore 1:072fd24cc12b 225 if (_polling_mode) {
falingtrea 0:3f52908a334d 226 char datain[3];
falingtrea 0:3f52908a334d 227 MPL3115A2::readRegister(P_MIN_MSB, datain, 3);
falingtrea 0:3f52908a334d 228 /* data is 20 bit signed/unsigned with 4 LSB = 0 Need to shift to 32 bits to preserve sign bit
falingtrea 0:3f52908a334d 229 * Altitude is 16 bit signed and pressure is 18 bit unsigned
falingtrea 0:3f52908a334d 230 */
falingtrea 0:3f52908a334d 231 _data._minbaro = ((datain[0] << 24) | (datain[1] << 16) | (datain[2] << 8));
falingtrea 0:3f52908a334d 232
mfiore 1:072fd24cc12b 233 if (clear_data) {
mfiore 1:072fd24cc12b 234 memset(datain, 0, 3);
falingtrea 0:3f52908a334d 235 MPL3115A2::writeRegister(P_MIN_MSB, datain, 3);
falingtrea 0:3f52908a334d 236 }
falingtrea 0:3f52908a334d 237 }
falingtrea 0:3f52908a334d 238
falingtrea 0:3f52908a334d 239 return _data._minbaro;
falingtrea 0:3f52908a334d 240 }
falingtrea 0:3f52908a334d 241
falingtrea 0:3f52908a334d 242 int32_t MPL3115A2::getMaxBaro(bool clear_data)
falingtrea 0:3f52908a334d 243 {
mfiore 1:072fd24cc12b 244 if (_polling_mode) {
falingtrea 0:3f52908a334d 245 char datain[3];
falingtrea 0:3f52908a334d 246
falingtrea 0:3f52908a334d 247 MPL3115A2::readRegister(P_MAX_MSB, datain, 3);
falingtrea 0:3f52908a334d 248 /* data is 20 bit signed/unsigned with 4 LSB = 0 Need to shift to 32 bits to preserve sign bit
falingtrea 0:3f52908a334d 249 * Altitude is 16 bit signed and pressure is 18 bit unsigned
falingtrea 0:3f52908a334d 250 */
falingtrea 0:3f52908a334d 251 _data._maxbaro = ((datain[0] << 24) | (datain[1] << 16) | (datain[2] << 8));
falingtrea 0:3f52908a334d 252
mfiore 1:072fd24cc12b 253 if (clear_data) {
mfiore 1:072fd24cc12b 254 memset(datain, 0, 3);
falingtrea 0:3f52908a334d 255 MPL3115A2::writeRegister(P_MAX_MSB, datain, 3);
falingtrea 0:3f52908a334d 256 }
falingtrea 0:3f52908a334d 257 }
falingtrea 0:3f52908a334d 258
falingtrea 0:3f52908a334d 259 return _data._maxbaro;
falingtrea 0:3f52908a334d 260 }
falingtrea 0:3f52908a334d 261
falingtrea 0:3f52908a334d 262 int16_t MPL3115A2::getMinTemp(bool clear_data)
falingtrea 0:3f52908a334d 263 {
mfiore 1:072fd24cc12b 264 if (_polling_mode) {
falingtrea 0:3f52908a334d 265 char datain[2];
falingtrea 0:3f52908a334d 266 MPL3115A2::readRegister(T_MIN_MSB, datain, 2);
mfiore 1:072fd24cc12b 267 /* data is 12 bit signed with 4 LSB = 0 Need to shift first to 16 bits to preserve sign bit then
mfiore 1:072fd24cc12b 268 * divide by 16 to remove LSBs
mfiore 1:072fd24cc12b 269 */
falingtrea 0:3f52908a334d 270 _data._mintemp = ((datain[0] << 8) | datain[1] );
falingtrea 0:3f52908a334d 271 _data._mintemp /= 16;
falingtrea 0:3f52908a334d 272
mfiore 1:072fd24cc12b 273 if (clear_data) {
mfiore 1:072fd24cc12b 274 memset(datain, 0, 2);
falingtrea 0:3f52908a334d 275 MPL3115A2::writeRegister(T_MIN_MSB, datain, 2);
falingtrea 0:3f52908a334d 276 }
falingtrea 0:3f52908a334d 277 }
falingtrea 0:3f52908a334d 278
falingtrea 0:3f52908a334d 279 return _data._mintemp;
mfiore 1:072fd24cc12b 280 }
mfiore 1:072fd24cc12b 281
falingtrea 0:3f52908a334d 282 int16_t MPL3115A2::getMaxTemp(bool clear_data)
falingtrea 0:3f52908a334d 283 {
mfiore 1:072fd24cc12b 284 if (_polling_mode) {
falingtrea 0:3f52908a334d 285 char datain[2];
falingtrea 0:3f52908a334d 286 MPL3115A2::readRegister(T_MIN_MSB, datain, 2);
mfiore 1:072fd24cc12b 287 /* data is 12 bit signed with 4 LSB = 0 Need to shift first to 16 bits to preserve sign bit then
mfiore 1:072fd24cc12b 288 * divide by 16 to remove LSBs
mfiore 1:072fd24cc12b 289 */
falingtrea 0:3f52908a334d 290 _data._maxtemp = ((datain[0] << 8) | datain[1] );
falingtrea 0:3f52908a334d 291 _data._maxtemp /= 16;
falingtrea 0:3f52908a334d 292
mfiore 1:072fd24cc12b 293 if (clear_data) {
mfiore 1:072fd24cc12b 294 memset(datain, 0, 2);
falingtrea 0:3f52908a334d 295 MPL3115A2::writeRegister(T_MAX_MSB, datain, 2);
falingtrea 0:3f52908a334d 296 }
mfiore 1:072fd24cc12b 297 }
falingtrea 0:3f52908a334d 298
falingtrea 0:3f52908a334d 299 return _data._maxtemp;
mfiore 1:072fd24cc12b 300 }
falingtrea 0:3f52908a334d 301
falingtrea 0:3f52908a334d 302 MPL3115A2_DATA MPL3115A2::getAllData(bool clear_data)
falingtrea 0:3f52908a334d 303 {
falingtrea 0:3f52908a334d 304
mfiore 1:072fd24cc12b 305 if (_polling_mode) {
falingtrea 0:3f52908a334d 306 char datain[10];
falingtrea 0:3f52908a334d 307 MPL3115A2::readRegister(OUT_P_MSB, datain, 5);
falingtrea 0:3f52908a334d 308 /* data is 20 bit signed/unsigned with 4 LSB = 0 Need to shift to 32 bits to preserve sign bit
falingtrea 0:3f52908a334d 309 * Altitude is 16 bit signed and pressure is 18 bit unsigned
falingtrea 0:3f52908a334d 310 */
falingtrea 0:3f52908a334d 311 _data._baro = ((datain[0] << 24) | (datain[1] << 16) | (datain[2]<<8));
falingtrea 0:3f52908a334d 312
mfiore 1:072fd24cc12b 313 /* data is 12 bit signed with 4 LSB = 0 Need to shift first to 16 bits to preserve sign bit then
mfiore 1:072fd24cc12b 314 * divide by 16 to remove LSBs
mfiore 1:072fd24cc12b 315 */
falingtrea 0:3f52908a334d 316 _data._temp = ((datain[3] << 8) | datain[4]);
falingtrea 0:3f52908a334d 317 _data._temp /= 16;
falingtrea 0:3f52908a334d 318
mfiore 1:072fd24cc12b 319 MPL3115A2::readRegister(P_MIN_MSB, datain, 10);
mfiore 1:072fd24cc12b 320 /* data is 20 bit signed/unsigned with 4 LSB = 0 Need to shift to 32 bits to preserve sign bit
mfiore 1:072fd24cc12b 321 * Altitude is 16 bit signed and pressure is 18 bit unsigned
mfiore 1:072fd24cc12b 322 * temperature data is 12 bit signed with 4 LSB = 0 Need to shift first to 16 bits to preserve sign bit then
mfiore 1:072fd24cc12b 323 * divide by 16 to remove LSBs
mfiore 1:072fd24cc12b 324 */
falingtrea 0:3f52908a334d 325 _data._minbaro = ((datain[0] << 24) | (datain[1] << 16) | (datain[2] << 8));
falingtrea 0:3f52908a334d 326 _data._mintemp = ((datain[3] << 8) | datain[4] );
falingtrea 0:3f52908a334d 327 _data._mintemp /= 16;
falingtrea 0:3f52908a334d 328 _data._maxbaro = ((datain[5] << 24) | (datain[6] << 16) | (datain[7] << 8));
falingtrea 0:3f52908a334d 329 _data._maxtemp = ((datain[8] << 8) | datain[9] );
falingtrea 0:3f52908a334d 330 _data._maxtemp /= 16;
falingtrea 0:3f52908a334d 331
mfiore 1:072fd24cc12b 332 if (clear_data) {
mfiore 1:072fd24cc12b 333 MPL3115A2::clearMinMaxRegs();
falingtrea 0:3f52908a334d 334 }
mfiore 1:072fd24cc12b 335 }
falingtrea 0:3f52908a334d 336
falingtrea 0:3f52908a334d 337 return _data;
falingtrea 0:3f52908a334d 338 }
falingtrea 0:3f52908a334d 339
falingtrea 0:3f52908a334d 340 uint8_t MPL3115A2::writeRegister(uint8_t reg, char* data, uint8_t count)
falingtrea 0:3f52908a334d 341 {
falingtrea 0:3f52908a334d 342 char buf[11];
falingtrea 0:3f52908a334d 343 uint8_t result = 0;
falingtrea 0:3f52908a334d 344
falingtrea 0:3f52908a334d 345 buf[0] = reg;
falingtrea 0:3f52908a334d 346 memcpy(buf+1,data,count);
falingtrea 0:3f52908a334d 347
Mike Fiore 2:cc50526dae10 348 __disable_irq(); // Tickers and other timebase events can jack up the I2C bus for some devices
falingtrea 0:3f52908a334d 349 result |= _i2c->write(_i2c_addr, buf, (count + 1));
Mike Fiore 2:cc50526dae10 350 __enable_irq(); // Just need to block during the transaction
mfiore 1:072fd24cc12b 351
mfiore 1:072fd24cc12b 352 if(result != 0) {
falingtrea 0:3f52908a334d 353 debug("MPL3115A2:writeRegister failed\n\r");
falingtrea 0:3f52908a334d 354 }
mfiore 1:072fd24cc12b 355
falingtrea 0:3f52908a334d 356 return result;
falingtrea 0:3f52908a334d 357 }
falingtrea 0:3f52908a334d 358
falingtrea 0:3f52908a334d 359 uint8_t MPL3115A2::readRegister(uint8_t reg, char* data, uint8_t count)
falingtrea 0:3f52908a334d 360 {
falingtrea 0:3f52908a334d 361 uint8_t result = 0;
falingtrea 0:3f52908a334d 362 char reg_out[1];
mfiore 1:072fd24cc12b 363
falingtrea 0:3f52908a334d 364 reg_out[0] = reg;
Mike Fiore 2:cc50526dae10 365 __disable_irq(); // Tickers and other timebase events can jack up the I2C bus for some devices
mfiore 1:072fd24cc12b 366 result |= _i2c->write(_i2c_addr,reg_out,1,true);
Mike Fiore 2:cc50526dae10 367 __enable_irq(); // Just need to block during the transaction
falingtrea 0:3f52908a334d 368
mfiore 1:072fd24cc12b 369 if(result != 0) {
falingtrea 0:3f52908a334d 370 debug("MPL3115A2::readRegister failed write\n\r");
falingtrea 0:3f52908a334d 371 return result;
falingtrea 0:3f52908a334d 372 }
mfiore 1:072fd24cc12b 373
Mike Fiore 2:cc50526dae10 374 __disable_irq(); // Tickers and other timebase events can jack up the I2C bus for some devices
mfiore 1:072fd24cc12b 375 result |= _i2c->read(_i2c_addr,data,count,false);
Mike Fiore 2:cc50526dae10 376 __enable_irq(); // Just need to block during the transaction
falingtrea 0:3f52908a334d 377
mfiore 1:072fd24cc12b 378 if(result != 0) {
falingtrea 0:3f52908a334d 379 debug("MPL3115A2::readRegister failed read\n\r");
falingtrea 0:3f52908a334d 380 }
mfiore 1:072fd24cc12b 381
falingtrea 0:3f52908a334d 382 return result;
falingtrea 0:3f52908a334d 383 }